Type-writing machine.



Patented June 23, 1914.

2 SHEETS-SHBET 1.

WITNESSES:

INVENTOI? al/Md 73 v gamaZ m/ ATTORNEY E. B. HESS.

TYPE WRITING MACHINE.

APPLICATION FILED D3018, 1907.

1,100,733. Patented June 23, 1914.

2 SHBBTSSHEET 2.

WITNESSES: INVENTOR v 3". k; a aw/M 6 Z? A1 4 i g Quiz/ m ATTOHNE V EDWARD B. HESS, OF NEW YORK, N. Y. ROYAL TYPEWRITER COMPANY, INC., NEW YORK.

, ASSIGNOR, BY MESNE ASSIGNMENTS, TO 015 NEW YORK, N. Y., A CORPORATION OF TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented June 23, 1914.

Applicationfiled December 28, 1907. Serial No. 408,354.

To all whom it may concern Be it known that I, EDWARD B. HESS, a citizen of the United States, residing in the borough of Brooklyn, city and State of New York, have invented certain Improvements in Type-\Vriting Machines, of which the following is a specification.

This invention relates to platen shift, shift-lock and lock release devices applied more particularly to a key lever type bar front strike machine.

In the accompanying drawings: Figure '1 is a partial elevation of the right hand side of themachine, the side plate being indicated as broken away: Fig. 1*, a plan showing the finger-pieces of a shift key and shift lock key: Fig. 2, a detail sectional View showing an eccentric bolt adjustment for fixing the exact position of the platen with reference to the printing point of the type bars in assembling the machine: Fig. 3, a front elevation of the eccentric bolt and nut: Fig. 4:, a detail plan view partly in section showing the shift key levers and rock shaft to which they are applied: Fig. 5, a view similar to Fig. 1 showing a modification of the carriage shift and balancing devices: and Fig. 6, a detail sectional view showing a ball bearing applied to the rock shaft of the upper parallel arm links as used in Fig. 5.

The construction will be described at first with particular reference to Figs. 1 to 4.

The platen 1 revolves in hearings in plates 2 carried upon a transversely traveling ,car-.

riage of which 3is the base rail that travels on ball bearings 4:, 5, on the shift rail 6 mounted inthe frame. The shift rail 6 has adjacent each end a downwardly extending arm 7 to which is pivoted the front ends of horizontally disposed parallel links 8, 9, rocking about axes on the frame at their rear ends. Each link 8 at its rear end rocks (Figs. 1 and 2) upon a rounded portion of an eccentric adjusting bolt 10, one end of which passes through an opening in the side plate 11 of the frame and has applied to it a lock nut 12. The purpose of such eccentric adjustment is to afford minute adjustment to accurately efl'eot alinement of the platen with respect to the printing point of the machine. Each of the lower links 9 may have any suitable h ing 9' on the side plates, as for insta ball hearing such as hereinafter descri and shown. in Fig. 6.

The carriage may be counterbalanced by a spring 13 vertically disposed, the lower end being attached to link 9 and the upper end to a pin l -t projecting from a bracket 15 on the side plate 11 of the main frame. The lower position of the platen'is determined by adjustable stops 16 mounted on the side plates and upon which the shift rail 6 of the carriage normally rests. Suitable stops for upper case position are, of course, provided. In the modification shown in Fig. 5 the upper links 8 are fixed on a rock shaft 17 (Fig. (3) at the ends of which are open steel cups 18 containing bearing balls cooperating .with the tapered ends of screw adjustable bearing bolts 19 turning in the side plates 11 of the frame. The rear ends of lower links 9 may have-ball hearings on the side plates. The halls are indicated in Fig. 5 by Q and are to cooperate with a screw adustable tapered bolt such as 19 of Fig. 6. In the construction of Fig. 5 the carriage is counterbalanced by h'orizontally disposed springs 20 (one at each side of the machine) each having one end attached to an arm 21 extending down from the rock shaft 17 and the other to a post 22 on the side plate of the machine.

In front of the parallel link system described there is a transverse rock shaft 23 that may have ball bearings similar tothat already described and shown in Fig. 6.

This appears in Fig. 4 wherein the adjustable tapered bearing bolts are marked 24. Fast upon the rock shaft 23 adjacent its respective ends are horizontally disposed carriage shift key levers 25 that extend rearwardly beyond the rock shaft under rollers 26 mounted in the.lower ends of the arms 7 extending downwardly from the base or shift rail of. the carriage. These shift key levers 25 have applied to their upturned front ends in the keyboard finger pieces 25'. When either shift key 25 is depressed, the shaft 23is rocked and the ends of lever arms 25 elevate the carriage for upper case printing. The shift key levers may be guided .in a comb plate 27 that nay be common to all the operating finger piece levers of the machine. To each key lever 25 is applied a spring 28. the reaction of which tends to hold the forward or finger piece ends of the levers in normal elevated position. The carriage is locked in normal or lower case position bya bell crank lever latch 29 engaging a shoulder 30 on one of the downwardly extending arms 7 of the carriage shift rail 6. The spring 31 tends normally towithdraw the latch 29 and release the carriage but the latch is normally held in looking position by the rear end of one ofthe shift levers 25 that overlies an eccentric adjustable laterally projecting pin 32 ill-the horizontally disposed arm 33 of the bell crank latch which is pivoted on the side plate-11 at 33. When a shift key lever is depressed, there is a, little lost motion before the rear ends of the leversv engage the rollers 26 and during this movement spring 31 withdraws the locking latch 29. The finger pieces of the shift key levers are re-v spectively marked Shift key, one of them being shown in plan in Fig. 1*. They are located respectively at opposite sides of the keyboard. At one side of the keyboard, preferably at the right hand side as indicated in the drawings, there is a horizontally disposed shift lock key lever 34 whose up-turned end 34' is provided with a finger piece marked Shift lock, Fig. 1. This lever may be conveniently mounted on rock shaft 23 on which it may turn. In the side of the up-turned part of the shift lock key lever 34 is a lateral projection 35 that overlies the upper edge of a rearwardly projecting arm 36 of a bell crank lever pivoted at 37- at the front of the keyboard and having a downwardly extending arm 38 to which is applied a coiled reaction spring 39 that tends normally to throw upwardly the rearwardly projecting arm 36. The lower edge of arm 36 overlies a lateral projection 40 on the side of the shift lever 25. This projection 40 is in the form of a pin circular in cross section, and in the rear edge or end ofvthe arm 36 is a notch 41 having a circular wall. The parts are so proportioned and related that on depression of the shift lock key lever, projection 35 depresses arm 36 which in turn acts upon pin 40 to depress the shift lever 25 and so effect shifting of the carriage for upper case printing. When, however, shift of the carriage is completed, pin 40 passes into the circular notch 41 as indicated by the dotted lines in Fig. 1 and effects a toggle lock of the carriage in shifted position. Any number of upper case impressions may be consecutively made while the carriage is so locked. Release of the lock to permit the carriage to return to normal lower case position may be effected by applying pressure to either one of the shift key finger pieces of levers 25, the effect being, by reason of the elasticity of the parts, to carry pin 40 out of engagement with notch 41 and, on release of such'pressur'e, all parts return to normal position for lower case printing. Thus, by depression of a shift lock key lever, a toggle lock is automatically effected to hold the carriage in shifting position and by pressure upon either of the ordinary shift key levers located respectively at opposite sides of the keyboard such lock is released.

I claim:

1. The combination with a vertically shiftable platen, of a transverse rock shaft having fast thereon adjacent each end a horizontally disposed shift key lever the ends of which extend beyond the rock shaft and effect the shift of the platen when either shift lever is actuated, a horizontally disposed shift-lock key lever, means whereby on depression of the shift lock lever the rock shaft is rocked and the platen shifted and means for automatically locking the carriage in shifted position when the shift lock key lever is operated and for releasing it when pressure is applied to either of the first named shift key levers.

2. The combination with a vertically shiftable platen, of a rock shaft, shift key levers carried by the rock shaft, a shift lock key lever, means whereby on operation of either of said levers the platen is shifted and a horizontally disposed arm 46 pivoted on the main frame and adapted to lock the platen in shifted position when the shift lock lever is operated.

3. The combination with a shiftable platen, of a transverse rock shaft carrying two horizontally disposed shift key levers each of which levers effects on actuation a shift of the platen, a horizontally disposed shift-lock key lever mounted on said rock shaft and on actuation of which the shaft is rocked and the platen shifted, and means for automatically locking the carriage in shifted position when the shift-lock key lever is operated and for releasing it when strain is applied to either of the first named shift key levers.

4. The combination with a vertically shiftable platen, a shift key lever at the right hand side of the machine pivoted toward its rear end, extending forward to the front of the machine and equipped with a finger piece in the keyboard at the right hand side thereof, a shift key lever similarly disposed at the left hand side of the machine, means whereby the platen is shifted when either of said shift key levers is depressed and a key at one side of the machine on depression of which the platen is shifted and also looked in shifted position, of means by which said lock is released when pressure is applied to the shift key lever on the latter side of the machine and a transverse rock shaft actuated by depression of the shift key lever on the other side of the machine to also effect release of said lock.

5. The combination with a shifting platen of means for shifting it by depression of either of two key levers, one at each side of the keyboard and each pivoted toward its rear end and extending forward toward the front of the machine and adapted to be operated by a finger piece, a third key lever and means for Shifting and automatically locking the platen by means of said third key lever and for releasing the lock b application of pressure to either one 0; the first named key levers.

6. The combination with a shifting platen, of means for shifting it by depression of either of twe key levers, one at each side of the keyboard and each ivoted toward its rear end and extending orward toward the .front of the machine and adapted to be operleasing the lock by application of pressure to either one of the first ,named key levers.

'In'testimony whereof, I have hereunto 2o subscribed my name.

EDWARD B. HESS.

Witnesses:

EDWARD C. DAVIDSON, L. F. BROWNING. 

